发明名称 |
Roll grooved pipe |
摘要 |
A roll grooved pipe is provided on its inner surface with a hydrofoil surface providing a transition between the inner surface of the pipe and the radially innermost portion of a radially inwardly extending step formed in the inner wall of the pipe by the cold rolling of the groove in the pipe.
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申请公布号 |
US5246256(A) |
申请公布日期 |
1993.09.21 |
申请号 |
US19920861586 |
申请日期 |
1992.04.01 |
申请人 |
VICTAULIC COMPANY OF AMERICA |
发明人 |
RUNG, ROBERT;DOLE, DOUGLAS R. |
分类号 |
F16L9/02;F16L21/06;F16L23/12;F16L58/18 |
主分类号 |
F16L9/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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